Your pools may have incompatible features in use that would prevent this. I recently set up an Ubuntu (19.10 desktop) box and cannot recv it's datasets on FreeN

Your pools may have incompatible features in use that would prevent this. I recently set up an Ubuntu (19.10 desktop) box and cannot recv it's datasets on FreeNAS. For now I'm just doing rsync of the snapshot directories, not upgrading the Ubuntu pool, and waiting on FreeNAS feature support to match.